From New York City or Boston, Dublin is as convenient a getaway as Seattle or Los Angeles (minus the whole passport thing). But if you're looking for an escape, Aer Lingus has decent deals to Ireland through the winter and spring—flights as low as $600. Buy tickets before October 16 for travel between November and March, which covers a much wider time range than most quick flight deals, although there are some blackout dates around the holidays. The best bets are Boston-Logan to Dublin or Shannon airports for $599 and New York-JFK to Dublin for $569.

If you want to combine your trip to Ireland with a visit to another point in Europe, this deal extends elsewhere on the continent. Flying from Boston to Rome with a layover in Dublin begins at $899, while New York to Paris via Dublin is $699.